American Pratical Navigator

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But no one knew how to correct a compass for deviation until Captain Matthew
Flinders, while on a voyage to Australia in ... the indication of the eartha#39;s rotation
during the short period in which his manually operated gyroscope remained in
rotation. ... and Anschutz-Kampfe, a German, independently invented gyro
compasses during the first decade of the 20th century. ... Sperrya#39;s compass was
found adequate, and in the years following World War I gyro compasses became
standardanbsp;...

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American Pratical Navigator

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- 1966

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